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Control the family-wise error rate when performing multiple hypothesis tests
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WYOUNG: control the family-wise error rate when performing multiple hypothesis tests


  • June 19, 2018
    • Better error handling for missing observations


Type which wyoung at the Stata prompt to determine which version you have installed. To install the most recent version of wyoung, copy/paste the following line of code:

net install wyoung, from("") replace

To install the version that was uploaded to SSC, copy/paste the following line of code:

ssc install wyoung, replace

These two versions are typically synced, but occasionally the SSC version may be slightly out of date.


wyoung is a Stata command that calculates adjusted p-values using the free step-down resampling methodology of Westfall and Young (1993). It also computes the Bonferroni-Holm and Sidak-Holm adjusted p-values.

For more details, see the Stata help file included in this package. Additional documentation is available online at


wyoung is not an official Stata command. It is a free contribution to the research community. You may cite it as:

Jones, D., D. Molitor, and J. Reif. 2018. "What Do Workplace Wellness Programs Do? Evidence from the Illinois Workplace Wellness Study." National Bureau of Economic Research Working Paper No. 24229.

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